debug statement

基本解释

To debug such a problem, it's important to know what the value of the variable is, using a print() or a die() statement.
要調試這類問題，重要的是用 print() 或 die() 語句知道變量的值是什麽。
Every time you consider writing a debug printout, consider writing a unit-test instead. ( or turn int into logging statement)
用單元測試或者記錄日志來代替測試時的輸出。
Note that this is a little more advanced than a typical HelloWorld application that prints the statement without user interaction, but the message is printed to debug.
注意，這比衹打印出 hello world 句子而沒有用戶交互的典型 HelloWorld 應用程序稍高級一些，但消息被輸出到了調試窗口。